41st Regiment
- 2nd Regiment Indiana Cavalry
- 40th/41st Royal Tank Regiment
- 41 Armoured Regiment (India)
- 41 Combat Engineer Regiment
- 41 Field Regiment (India)
- 41st (Oldham) Royal Tank Regiment
- 41st (Welsh) Regiment of Foot
- 41st Battalion (disambiguation)
- 41st Brigade (disambiguation)
- 41st Division (disambiguation)
- 41st Dogras
- 41st Illinois Volunteer Infantry Regiment
- 41st Infantry Regiment (Greece)
- 41st Infantry Regiment (United States)
- 41st New York Volunteer Infantry Regiment
- 41st Regiment Massachusetts Volunteer Infantry
- 41st Squadron (disambiguation)
- 41st Virginia Infantry
- 41st Wisconsin Volunteer Infantry Regiment
- Indian Army
- Yugoslav Air Force